/*if (window.Event) 
document.captureEvents(Event.MOUSEUP); 
function nocontextmenu(){ 
event.cancelBubble = true 
event.returnValue = false; 
return false; 
} 
function norightclick(e){ 
if (window.Event){ 
if (e.which == 2 || e.which == 3) 
return false; 
} 
else 
if (event.button == 2 || event.button == 3){ 
  event.cancelBubble = true 
  event.returnValue = false; 
  return false; 
} 
} 
document.oncontextmenu = nocontextmenu; // for IE5+ 
document.onmousedown = norightclick; // for all others 

function shibai()
{
    return false;
}
function jingyong()
{
    document.selection.empty();
}
document.body.oncontextmenu=shibai;
document.body.ondragstart=shibai; 
document.body.onselectstart=shibai; 
document.body.onselect=jingyong;
document.body.oncopy=jingyong;
document.body.onbeforecopy=shibai; 
document.body.onmouseup=jingyong;*/